The header consists of data that describes the image, the most important being patient data. The header may also give information on image characteristics such as acquisition parameters, pixel intensity, matrix size, and dimensions of the image. When a file explorer is opened to view DICOM medical imaging data, the header can give patient and image information.
The header is usually coded to the image so that the patient to whom the image belongs can easily be identified. Sometimes, you may want to intentionally lose the header data, usually for the purpose of anonymization in research cases.
This can only be done using specific software functions. This depends on the purpose for which you want the files. If you are a patient and have had scans taken, you would probably receive a CD or DVD with images on it. If you are a medical student and want to view DICOM images for learning and study, you can download such images from online resources.
If you are a radiologist and need to access files in order to interpret them and identify diagnoses, you will need to use a PACS server. Online resources: If you are a student and are looking for medical images to learn from, there are several online resources that can help you. This is basically a database in which all medical images are stored.
Each hospital usually has its own PACS server. Any medical image that is taken within a hospital is automatically stored within that PACS server. There are basically two kinds of software for viewing DICOM medical imaging data—proprietary software and third party software. Proprietary software comes along with the hardware for medical imaging and is usually created by the same manufacturer.
Proprietary software allows users to dynamically view sequential images and also allows reconstruction of these images. One major drawback is that these image files can only be viewed in the same location as the hardware. The images can be transferred to portable storage devices or to other computers on the network only by compressing the images described in the section below.
However, once images are exported, the ability to view and edit the original image is usually lost. The market today is flooded with DICOM viewing applications, with both free and paid options available.
Each DICOM medical image viewer has its own set of features and you can choose among them depending on your specific requirements. Some applications are sophisticated enough to improve the image quality as well as generate additional data from the acquired images which can aid in diagnosis. Some of the functions that you can perform, in addition to simply viewing the image, include. Enhancing the image quality: You can increase or decrease the brightness of the image.
By changing the contrast, you can distinguish better between radiodense and radiolucent areas of an image. You can also zoom in on the area of interest. A special method of improving image quality in the area of interest involves maximum and minimum intensity projections.
DICOM maintains a list of all standard attributes more than of them , known as the DICOM data dictionary, to ensure consistency in attribute naming and processing. Unable to display preview. Download preview PDF. Skip to main content. This service is more advanced with JavaScript available. Officially, the latest version of the standard is still 3. DICOM is used extensively for medical imaging in hospitals. It is used in the processes of diagnosing and treating patients, tracking patient outcomes and scheduling procedures, ICD coding, billing and teleradiology to transmit radiological patient images, such as X-rays, CTs, and MRIs, these are the different modalities, from one location to another for the purposes of sharing studies with other radiologists and physicians.
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